The definition of your first sensitivity parameter PPA is missing the required “sensitivity type” keyword (EMIS, INIT, BOUN, RATE, or HIGH) after “PPA” and before “SPECIES”.
PPA
SPECIES
SO2
This is why the LOG file says " Sentype not recognized: SPECIES"
From the documentation included in the example file:
(mandatory) The next line specifies the type of sensitivity (One leading space followed by 4 capitalized characters)
EMIS: Emissions
INIT: Initial Conditions
BOUN: Boundary Conditions
RATE: Reaction rate
HIGH: Higher-order sensitivity.
(mandatory) For EMIS, the next line specifies the emissions streams to be used for this parameter. The comma-delimited list must have two leading spaces. The stream names must be defined in the run script. Alternatively, the key word ‘TOTA’ will use all model emissions for this parameter.